Design of a High-resolution miniature raman spectrometer with Multi-fiber array input

TAN Lili; YANG Zhaoqing; FU Wei; GUO Hanming

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Design of a High-resolution miniature raman spectrometer with Multi-fiber array input

Optical Devices & System Design | 更新时间：2025-10-09

- Design of a High-resolution miniature raman spectrometer with Multi-fiber array input
- OPTICAL TECHNIQUE Vol. 51, Issue 4, Pages: 468-473(2025)
- 作者机构：
  
  1.上海理工大学光电信息与计算机工程学院，上海 200093
  2.上海理工大学上海市现代光学系统重点实验室，上海 200093
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP394.1;TH691.9
- Received：09 December 2024，
  
  Revised：2025-01-12，
  
  Published：20 July 2025
- 稿件说明：
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谭莉莉,杨照清,傅伟等.多光纤阵列输入高分辨率微型拉曼光谱仪设计[J].光学技术,2025,51(04):468-473.

TAN Lili,YANG Zhaoqing,FU Wei,et al.Design of a High-resolution miniature raman spectrometer with Multi-fiber array input[J].OPTICAL TECHNIQUE,2025,51(04):468-473.
谭莉莉,杨照清,傅伟等.多光纤阵列输入高分辨率微型拉曼光谱仪设计[J].光学技术,2025,51(04):468-473. DOI：

TAN Lili,YANG Zhaoqing,FU Wei,et al.Design of a High-resolution miniature raman spectrometer with Multi-fiber array input[J].OPTICAL TECHNIQUE,2025,51(04):468-473. DOI：

摘要

研究针对传统光谱仪采用单根光纤入射导致像面利用率不足、拉曼散射光探测能量弱的问题，提出了一种基于多光纤阵列输入的高分辨率光谱仪设计。通过沿狭缝弧矢方向排列七根入射光纤作为入射光源，并结合柱透镜与像散校正理论对光路进行优化。该系统采用785nm激发波长，可在七个视场内实现170~3200cm

-1

宽光谱覆盖，全波段分辨率达到7cm

-1

。实验结果表明，相较于单根光纤入射时72%的像面利用率，集束光纤结合柱透镜的设计将光谱仪像面利用率显著提升至97%，且各光纤传输能量在像面上分布均匀。该方案为需要高能量探测效率和强度的应用场景提供了可行方案。

Abstract

In this study

a high-resolution spectrometer with a multi-fiber array input design is proposed to address the issue of weak Raman-scattered light detection energy caused by insufficient image plane utilization in conventional spectrometers that use a single optical fiber as the incident light source. The design optimizes the optical path by arranging seven incident optical fibers along the sagittal direction of the s

lit and incorporating a cylindrical lens for astigmatism correction. The system employs a 785 nm excitation wavelength and achieves a broad spectral coverage of 170~3200 cm

-1

across seven fields of view

achieving a full-band resolution of 7 cm

-1

. Experimental results demonstrate that

compared to the 72% image plane utilization achieved with a single fiber configuration

the proposed design—featuring clustered fibers combined with a cylindrical lens significantly improves the image plane utilization to 97%

while maintaining uniform energy distribution across the image plane. This solution offers an effective approach for applications demanding high energy detection efficiency and intensity.

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references

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